Multibody orientation control

Hi
How can we insert single geometry multiple times, also how can we control their orientation.
You will get more idea about the problem in following video links:
https://www.youtube.com/watch?v=FmAm6QoXeB8
https://www.youtube.com/watch?v=9A5n6p4OmaE

In the above videos nearly-randomly oriented flexible fibers are fallen from a certain height. If I have the geometry for a single flexible fiber how can I make multiple insertions at different orientations

Thanks